Los Angeles Math Circle

4/27: Probability in Action (Andrea Brose)

Paradoxes!
Paradoxes: well known ones such as the famous Monty Hall, Birthday, Daughter-Sons, Socks and Murder Problems, to lesser known ones. (You flip three nickels, at least two land with the same side up, and there is a 50-50 chance that the third shows Thomas Jefferson or his Monticello. Thus P(all nickels land with the same side up)=0.5, right?)